The air quality in Mexico City remains significantly poor, leading authorities to maintain Phase 1 of the environmental contingency plan, which includes a "Doble Hoy No Circula" (Double No Driving Day) for vehicles on Thursday, March 20, 2025. This measure reflects an ongoing struggle with high ozone levels that have prompted stringent vehicle restrictions across the region.
On the evening of March 19, 2025, at 20:00 hours, the Environmental Commission of the Megalopolis (CAMe) confirmed that the previous day’s maximum ozone concentration reached alarming levels. Reports indicated that ozone levels soared to 155 parts per billion (ppb), necessitating the ongoing restrictions.
As per the contingency measures announced earlier, all vehicles with verification hologram 2 must remain off the roads, along with the majority of cars displaying verification hologram 1. Specifically, vehicles with a green sticker and license plates ending in 1 and 2 are also under this restriction. The Hoy No Circula program is set to run from 05:00 to 22:00 hours on March 20, compelling many drivers to rethink their travel plans.
Furthermore, any violations of the Hoy No Circula program carry hefty fines ranging between 2,000 and 3,000 pesos and may result in the vehicle being impounded. Given the gravity of the situation, residents are advised to exercise caution against pollution peaks predicted to occur between 1:00 PM and 7:00 PM.
In light of the adverse environmental conditions, the CAMe has called for the public to avoid outdoor activities and postpone any scheduled cultural, social, or sporting events, reiterating health safety as a top priority.
As of March 18, 2025, the onset of the "ozone season," which spans from February to June, has intensified the environmental challenges faced by the metropolitan area. It leads to conditions where relatively low humidity, coupled with high solar radiation, can trap pollutants like ozone in the atmosphere.
In addition to vehicle restrictions, there are guidelines for specific groups, particularly sensitive individuals who should curb physical activities. Authorities emphasize the importance of remaining alert to ongoing air quality updates from the CAMe.
With the Doble Hoy No Circula continuing into March 20, authorities will reassess the situation continually. Decisions will be made based on the air quality metrics, ensuring that the measures in place adequately protect public health.
It is worth noting that the verification process for vehicles includes various categories. Vehicles with hologram 0 and 00, which are usually those considered cleaner and more efficient, remain exempt from the restrictions. Also included in the exceptions are electric vehicles, hybrid models, and public transport vehicles that meet current verification requirements.
For those caught without adherence to the Hoy No Circula program, penalties remain strict: fines reaching up to 30 times the current unit of measurement, meaning financial burdens can escalate significantly for offenders, compelling many to take heed of the restrictions more seriously.
While the Doble Hoy No Circula is a contentious measure among many drivers in Mexico City, its effectiveness in curbing air pollution remains a primary objective. By limiting vehicle use during days of high pollution, authorities hope to foster a cleaner, healthier urban environment for residents.
The CAMe has reiterated its commitment to transparency and regular communication with the public regarding air quality accelerations and de-escalations, urging residents to stay informed through official channels and apps providing real-time data. With continual updates expected, motorists should remain vigilant about any changes that may occur.
Monitoring air quality and pollution levels, especially in this vulnerable season, is crucial for the health of the populous. As residents navigate these restrictions, it’s imperative they stay safe and informed.
